Across
- 4. X-rays carry more of this than UV rays
- 5. The part of you that detects visible light radiation
- 6. Property of waves equal to their (wave frequency) x (wavelength)
- 8. The result of light changing speed in different density materials
- 9. A signal that constantly varies
- 11. The angle where all light is just refracted inside a material
- 12. These surfaces absorb IR radiation and heat up
- 13. Radiation reflected by shiny surfaces, so reduces heating
- 16. Layer of the atmosphere that can refract radio waves
- 18. Total Internal ______; how light passes along optical fibres
Down
- 1. One advantage of wi-fi is that it is .....
- 2. The number of waves that occur every second
- 3. Method of cooking that uses IR to heat the surface of foods intensly
- 6. What you are if you get all of these right
- 7. Essential kit for beaming microwave messages round the globe
- 10. Can cause sunburn and skin cancer
- 14. A good insulator
- 15. A code used on ships in the world wars
- 17. A device that uses optical fibres to see into hidden places
- 19. A device that creates in-phase beams of light